A man pointed a gun at them and pulled the trigger.
...trigger devices for nuclear weapons.
The thieves must have deliberately triggered the alarm and hidden inside the house...
The one thousand pound bomb was triggered by a wire.
那颗重达 1,000 磅的炸弹是由一根导线引爆的。
…nuclear triggering devices.
...the incident which triggered the outbreak of the First World War...
The current recession was triggered by a slump in consumer spending…
Even a problem as simple as a bad back often has an underlying triggering factor.
Stress may act as a trigger for these illnesses.